Expression, purification, crystallization and preliminary X-ray crystallographic analysis of Enpp6.

Enpp (ectonucleotide phosphodiesterase/pyrophosphatase) 6 is a membrane-bound glycoprotein that hydrolyzes choline-containing compounds such as lysophosphatidylcholine and glycerophosphorylcholine, and presumably participates in choline metabolism. The catalytic domain of mouse Enpp6 was expressed in HEK293T cells, purified using the TARGET tag/P20.1-Sepharose system and crystallized. An X-ray diffraction data set was collected to 1.8 Å resolution. The crystal belonged to space group P1, with unit-cell parameters a=63.7, b=68.8, c=69.7 Å, α=60.6, β=87.0, γ=68.1°. Assuming the presence of two protein molecules per asymmetric unit, the solvent content was estimated to be 49.5%.

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